61627720571687 has 2 divisors, whose sum is σ = 61627720571688. Its totient is φ = 61627720571686.

The previous prime is 61627720571671. The next prime is 61627720571743. The reversal of 61627720571687 is 78617502772616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61627720571687 - 2⁴ = 61627720571671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61627720171687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30813860285843 + 30813860285844.

It is an arithmetic number, because the mean of its divisors is an integer number (30813860285844).

Almost surely, 2^{61627720571687} is an apocalyptic number.

61627720571687 is a deficient number, since it is larger than the sum of its proper divisors (1).

61627720571687 is an equidigital number, since it uses as much as digits as its factorization.

61627720571687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82978560, while the sum is 65.

The spelling of 61627720571687 in words is "sixty-one trillion, six hundred twenty-seven billion, seven hundred twenty million, five hundred seventy-one thousand, six hundred eighty-seven".